Pre-Disassembly Procedure - Acer Aspire X3990 Service Manual

Pre-disassembly Procedure

Before proceeding with the disassembly procedure, perform the steps listed below:
Turn off the system and all the peripherals connected to it.
1.
Unplug the power cord from the power outlets.
2.
Unplug the power cord from the system.
3.
Unplug all peripheral cables from the system.
4.
Place the system unit on a flat, stable surface.
5.
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